Question

Fig. 3.5 shows displacement $\left(x\right)$ versus times $\left(t\right)$ graph of a particle. Find the time $t$ such that the average velocity of the particle during the period $0$ to $t$ is zero.

Answer 1

Average velocityv=$\frac{Totaldispalcement}{totaltime}$

$att=0\to s=2-m$

$att=15s\to s=20m$

Hence total displacement=0

Average velocity=0 during the period t=0 to t=15s

$t=15s$